Safety brake or rough lock



Sep. Z?, i949. W. J, HERGNER 2,483,048

SAFETY BRAKE OR ROUGH LOCK Filed Sept. 1l, 1945 2 Sheets-Sheet l y INVEN TOR. izzefeil/jgfzw;

ATTE RN EYS Sept. 2'?, 1949. v w. J. HERGNER SAFETY BRAKE OR ROUGH LOCK2 Sheets-Sheet 2 Filed Sept. l1. 1945 @NNI INVENTOR.

ATTC! R N EYE Patented Sept. 27,V 1949 UNI TE D STAT-ES T O FFI CESAFETY BRAKE R ROUGH LOCK Wenzel J. Hergner, Mcleesport, Pa.

Application September 11, 1945,Serial No.1615,577

(Cl. 18S-9.744,)

,2 Claims. 1

My present invention, in its bread aspect, has toda with Safety eremergency brakes or rouenleeks" fertrnelss. and. other wheeled vehicles,and especially indicated for use with heavily loaded trunks or 'dieliberen hills. er elsewhere where pesainle. accidental or unintendedmovement of the metervehlele either forward or backward might occur dueto slipping or failuregf the @Onlentignal brakes Mele particularly, itis my purpose to provide improved wedging blocks, and supports andoperating .means jfor .the same, whereby the Wheels Qi the vehicle maybewedged and. blocked either in front or vin back, or both front and inback, thereby to effectively block the wheels against any movementwhether the vehicle is on a hilltop-elsewhere.

Qther and important objects ci my invention are: (l) to provide a cable,drum, and leverage action with a `dog and ratchet actuating mechanismforapplying and releasing the brake in the most effective and practicalmanner, (2l). to provide a clutch associated with said drum operated byleverage action to retain the drum in fixed relation to a shaft on whichsaid drum and said clutch are mounted, and 3) to provide a sturdy,simple and eicient device which may be installed on conventional trucks,and other wheeled and powered vehicles without change in structure orexcessive labor and cost.

Additional objects and advantages will be apparent from the followingdescription and drawings, butin that connection, it is to be understoodthat changes in size, form, shape, construction, and arrangement ofparts may be made without departing from the spirit of my invention, orthe scope of the appended claims.

In the drawings wherein I have illustrated a preferred form of myinvention:

Figure 1 is a diagrammatic view of a truck with by invention applied;

Figure 2 is a top plan view thereof;

Figure 3 is a rear end View of the rear wheels with the invention .inbraking position;

Figure 4 is a sectional view of the dog and ratchet, and clutchoperating mechanism for the drum;

Figure 5 is a full view of Figure 4;

Figure 6 is a sectional View on line 6-6 of Figure 5 with the lever inraised position;

Figure '7 is a sectional view on the line 1-1 of Figure 4, and

Figure 8 is a perspective view of one of the brake blocks.

In the drawings wherein like characters of reference are used todesignate like or similar parts:

The numeral I0 designates the longitudinal side rails o a truck-trailerchassis, on which is the body l2, cab I4, drivers seat |6, steeringwheel I8, hoed 2.0, front wheels .252, intermediate wheels 24, trailerWheelsl .and connection between the trailer body and truck.

Mounted conveniently to the driver are rrotatable drums .32 and 34 veachcarrying a ,ratchet 3.6, a dos 38, Yhaving the spring latch .3 9 andoperatlne lever for each dog, The drums may be spaced one above theother and mounted on the dashboard as shown in Figure 1, with theratchet levers 46 Aco,nvenient to the driver. The 32 and 34 arerotatably `mounted on the shaft 42 having the squared portion 44 andboth ends -of the shaft are xed in bearings 46, the ronndend bya pin 48and the square portion in the square opening with the bearings.v Thebearings are xed to `the dashboard 50 by bolts 52, The xed cluteh.elements 54 of the clutches 56 are ixedto the drums, 32 .and 3 4-androtate there` with. The movable` clutch elements 53 of the clutches. 56are .mounted on the squared portion 44 .of the shaft 42., Therefore whenvthe clutch elements are engaged the drums 32 and 34 are prevented fromrotating on the shaft 42. Springs 6D mounted on the shafts 42intermediate the movable clutch elements 58 and the bearings 46 abut theelements 58 and force the clutches into engaged position at all times.

Disengagement of the clutches 56 is obtained by collars 62 looselymounted on the elements 58 which are actuated by means of the forkedends 64 of the yokest66 co-acting with the pins 68 fixed in the collars62.

The handles 76, pivotally mounted on the levers 46 at l2, arediametrically opposite the handles 14, pivotally mounted on the levers46 at 16 that actuate the dogs 38 by rods 18. The handles actuate theyokes S6 by rods 86, the yokes 66 being pivotally mounted on the levers46 by arms 82. A pair of idler pulleys 84 are located on the oor board86 and another pair of idler pulleys 88 over the rear wheels and spacedapart longitudinally to be in front and back .of the rear wheel axle.Cables 96 and 92 lead from drums 32 and 34 over their respective pulleys84 to the cables 94 and 96 respectively where they are joined to thesecables at 66, the cables 94 and 96 then pass over pulleys |66 and |02,and pulleys 88 and engage angularly depending crossed arms |64 and |66which are pivoted at their upper ends by bolts |68 in brackets ||6secured on the chassis and cross each other at about in line with thehub of the rear wheel, and extend to a point near the ground in frontand in back of the rear wheel r trailer Wheels 26. The cables 94 and 96engage the arms near their ends, and each arm pivotally engages an endof a Wedge block H4 at I I2. There are two Wedge blocks II4 and H6, andas shown in Figure 1, there are crossed arms |04 and |06 at each side ofthe vehicle, the Wedge blocks being engaged by an arm at each end. Eachwedge block has two plane faces at right angles to each other designatedat H8, and an arcuate face |20 between the ends of the two to receivethe tread of a tire to slightly elevate the Wheel from the ground.

In operation, the arms |64 and |66 are raised by rotating drums 32 and34 by means of the levers lit) actuating the ratchet 35 by means of thedogs S8. The clutch elements 54 and 58 will slip past each other duringthe rotation of the drum and when the blocks are in full raised po- Ysition, the clutches 56 will lock the drum andY prevent further rotationor unwinding thereof.

To position the blocks I I4 and H6, the handles FG and I4 are depresseddisengaging the dog and yoke permitting the blocks to fall into place bygravity under the tread as shown in Figure 1 to block the vehicle. Y

From the foregoing, it is believed the operation and advantages of myinvention will be apparent but interpretation of the scope thereofshould only be conclusive when made in the light of the subjoinedclaims.

I claim: f 1. In a safety brake fora wheeled vehicle, a rst pair of armsarranged in criss-cross relation with respect to each other and havingtheir upper ends pivotally connected to said vehicle, a second pair ofarms arranged in criss-cross relation with respect to each other andhaving their upper ends pivctally connected to said vehicle, said firstand second pairs of arms being spaced from each other and arranged inembracing relation with respect tc the wheels of said vehicle, a pair ofhorizontally-disposed spaced Wedge blocks eX- tending between said armsand secured to the latter and mounted for movement into and out offrictional engagement with respect to the Wheels, and manually-operablemeans operatively connected to said arms for causing pivotal {novementof the latter to thereby move said wedge blocks into and out ofengagement With\ said Wheels. i.

2. In a safety brake for a Wheeled Vehicle, a rst pair of arms arrangedin criss-cross relation with respect to each other and having theirupper ends pivotally connected to said vehicle, a second pair of armsarranged in criss-cross relation with respect to each other and havingtheir upper ends pivotally connected to said vehicle, said rst andsecond pairs .of arms being spaced from each other and arranged inembracing relation With respect to the wheels of said vehicle, a pair ofhorizontally-disposed spaced wedge blocks eX- tending between said armsand secured to the latter and mounted for movement into and out offrictional engagement with respect to the wheels, manually-,operablemeans operatively connected to said arms for causing pivotal movement ofthe latter to thereby move said Wedge blocks into and out of engagementwith said wheels, and means mounted in said vehicle for maintaining saidwedge blocks out of engagement with said wheels.

WENZEL J. HERGNER.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 2,182,044 Ackerman Dec. 5, 1939FOREIGN PATENTS Number Country Date 25,230 Great Britain 1898 35,793Switzerland Jan. 26, 1906

